Hand-truck.



PL J. MoGABE.

HEATING TANK FOB INOUBATOBS.

APrLIouIol nun uma, 190s.

Patented out; 25,1910.

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P. J. MUCABE.

HEATING TANK POB INGUBATOBB. nrLlpAlnol rum) nl. a. 190s.

Patented Oct. 25,1910.

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PATRICK J'. MCCABE, 0F MADISON LAKE, MINNESOTA.

HEATING-TANK FOR INCUBATORS.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Original application led July 3, 1908, Serial No. 441,817. Divided andthis application filed January 6, 1909. Serial No. 470,992.

heating incubators as disclosed in my coding application for patent,Serial Num- 'r 441,817, ined July e, 1908.

The purpose of the present invention is to provide a heating tank ofsuch structure lthat it is adapted to fit entirely within the incubator,and having an intermediate chamber or passage-way through the lengththereof, and through which the heat passes, thereb obtaining moreeffective and uniform eating of the water within the tank, thus kee ingthe hatching chambers at a more uni orm and effective temperature.

A further purpose of the invention is tol provide the heating-tank withmeans Whereby the heated air is, in circulating, passed over an exposedfilm of water, for the purses and with the results hereinafter set orth.

A further purpose of this invention is to provide an automatic heatregulator which, without the use of a thermostat, or other artificialdevice, but bv means of the air pressure only, will regulate thetemperature within the incubator.

With these as the essentials, my invention embodies other advantagesthat will appear in the course of the following detailed de- Scription,and set forth in the claims.

In the accompan ing drawings illustrating the invention: i ure 1 is ahorizontal sectional view of my improved tank shown applied to anincubator; Fig. 2 is a transverse sectional view of the tank shown inFig. 1, taken on the line a-Z); and Fig. 2a is a similar view taken onthe line Lv-w of Fig. 1. Fig. 3 is a horizontal sectional view of themodified form of tank. Fig. 4 is a transverse view of the tank shown inFig. 3 taken on the line -m; and Fig. 5 is an end elevation of the tankpartly shown in section along the line y-y o Fig. 3.

' Referring more in detail to the several views wherein like charactersof reference designate corresponding parts in the different figuresshown, the tank A comprises a rectangular metallic vessel adapted to beplaced substantially wholly within an incubator B. Throughout the lengthof the tank A there is a passage-way 1 communieating at one end with theheating` means and at the other end with the interior of the incubator.The former of said communications, designated 4, has a downwardlyflaring opening whereby the heated air .from

,the lamp G may be gathered and directed into the heating passage-way l.Said passage-way divides the water tank A into a plurality ofcommunicating chambers 2, 6 and 6. The water-chamber 2 is within thelower portion of the tank and extends substantially throughout thesurface of the lower wall thereof. The water-chamber 6 is that portionof the tank immediately over the flared opening 4, and projects beyondthe outer wall of the incubator B. The chamber 6 is narrower than thechamber 2 .but wider than the passage-way 1 at its fiared end 4, thusforming spaces on each `side of said passage-way which connect said`chambers 2 and 6 and enable the water 1n the tank to circulate freelytherethrough. The Water-chambers 2 and 6` communicate lwith thewater-chamber 6 by means of a pipe or inclosed water passage 7, whichpassage extends throughout the length of the heating chamber 1, for thepurpose of giving a greater surface to the action of the heat withinsaid chamber l.

That portion of the tank A within the vwalls of the incubator B isprovided with -an upstanding ledge 5 that extends entirely `around theside edges-of the inclosed upper Wall. vprovide a. chamber 3 adapted toreceive a `thin` film of water, the function of which The purpose ofthis provision is to within the tank I have Adevised a means wherebythis is readily accompllshed. The means comprising a balanclng bar orrod 9,

. vided an air conducting pipe 16 that communicates with the atmospherein the operrod 9 carries' at one end a plate 11 adapted to overhang anoutlet 12 that delivers the heat into the incubator from the chamber 1,and at its opposite end the rod 9 supports a valve 13 by means of a link14, said valve seating against the underside of the opening 15. Theproper regulation of the p ate 11 and valve 13 is effected by a movableweight 10 upon the rod 9. The valve supporting rod 9 is steadied in itsoperation by means of u standing guide-wires 8. In normal position theplate 11 and the valve 13 are ada ted to be substantially as that shownin ig. 1, wherein the plate 11 closely overhangs the opening 12 and theinlet 15 is closed. K

When the incubator is in operation the heat from the lamp G, passingthrough the passage-way 1, enters into the interior of the lncubator byway of the outlet 12, as stated. Now, if for any reason should the heatbecome excessive the additional outflow acting against the plate 11would force the same upward, thus permitting the valve 13 to drop;whereupon cold air from the operating room would enter the passage-way 1by way of the inlet passage-way 15, and reduce the temperature of theair in the passageway 1 until the plate 11 and the valve 13 assumedtheir normal positions. After the products of combustion have passedthrough the passage-Way 1 and heated the Water within the inclosedportion of the tank and Within the water-passage 7, the heated airenters the air spaces in the casing of the incubator, makes twocirculations, and iinally escapes through the vent 15 on top of theincubator into the operating room, in the manner described in my patentfor incubators, dated June 29, 1909, No. 926,434. To moisten orcondition this heated air before it is diffused in the incubatoroperating room, I subject the same to the action of the exposed film ofwater 5. Then this moistened air, passing into the o erating room,returns by Way of the venti ator 16 into the egg chamber. The purpose ofthis construction is to keep the air in the room in which the incubatoris bein operated as fresh as the air out of doors. lach egg has enoughnatural moisture in itself to hatch well if it does not come in contactwith dry air, which is certain to take from the egg some of its naturalsupply of moisture. Another advantage of this construction is that thebottom of my heating tank is of the same temperature over its entirearea, owing to the opposite directions of the returning water and theoutgoing air.

To the underside of the tank there is proating room, and which isprovided with perforations 17, through which said air is conducted intothe several hatching chambers,

In the modified form of tank shown in Fig. 3, the construction issubstantially that shown in Fig. 1, excepting that instead of having theexposed film of water on the upr wall .of the tank I have means forholding the same within the assage-way 1, which means comprises a le geor plate 23, welded or otherwlse secured to the bottom of saidpassage-way adjacent to the opening 4; and there 1s a further advantagethat instead of having an inclosed passage-way for conducting the waterthrough the length of the chamber 1 I form a separate wall, whichdivides the tank into an upper and lower water-chamber, designated 21and 22 respectively. The inclosed water-chambers are adapted to befilled by means of the pipe 19, and the chamber for holding the eX osedfilm of water by the pipe 20, both o said ipes communicating with theoutside of the incubator. In this type of structure the heat, in passingthrough the passage-way 1, is subjected to the exposed water and is thusmoistened or conditioned before entering the interior of the incubatorchamber.

If desired, the film of exposed water may be carried u on the top of thetank, as illustrated in 1g. 1, without departing from the spirit of myinvention.

In both of the structures shown, the operation of thus treating thewater is equally effective, but by reason of the simplicity of structureof the tank in the former instance I prefer and have shown that kind.There may, of course, be other types of tanks for effecting this sameresult, and I therefore do not wish to be understood to limit myself tothe precise details disclosed, but rather reserve, instead, the right tomake such changes as will better adapt the invention to its purposes,and in doing so limit myself only to the prior art to which thisinvention pertains.

I claim:

1. A hot Water heater comprising a tank provided with a horizontalpassageway therethrough having a downwardly turned mouth at one endopening on the under side to receive heated air and an opening on itsupper side near each end, said passageway being as Wide as the tank forthe greater part of its length, but narrower than said tank at the mouthend, and automatic valves controlling said upward openings.

2. A hot water heater comprising a tank provided with a horizontalpassageway therethrough having a downwardly turned mouth at one endopenin on the under side to receive heated air, sai passageway being aswide as the tank for the greater part of its length, but narrower thansaid tank at its mouth end to provide Water communication between thefront end of said tank and the portion below the heating passageway, anda water circulating tube extending through said heating passagewayconnecting the front to the rear of said tank.

3. A hot Water heater comprising a horizontal tank divided by ahorizontal diaphragm into an upper and lower section, the upper sectionserving as a passage for hot air and opening at the bottom of the tankto receive heated air, the lower portion of said tank adapted to holdWater' and having a forward and a rear Water section in communicationtherewith, and a circulating tube extending through the hot air sectionto connect the front and rear ends of the Water tank to eause water tocirculate therein.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

PATRICK J. MCCABE.

Witnesses F. B. KNoFi", GEO. T. SWEARiNonN.

